Improvement in combination locks



SAMUEL Lornqor NEW Yorin, N, Y.

` Letters Patent l\lo.'113,316, dated 'April 4, 1871.

IMPRovi-:MENT IN coMBlNTIoN LoKs.

The Schedule referred to in these Lettera Patent and making pax-tof thesame.

' I, SAMUEL Lop, of the city and county of Newv York,I have inventedcertain Improvements in Locks,

of which the following is a specification;

Nature and Object of the Inc-cation.

The object o i' my invention is to constrnct'an inexpensive, simple, andconvenient permutation lock, in which the combinations are set, and thelock unfastened, by the turning of a handle or knob to certain pointsindicated upon the dial, and requiring no key.

-The nature of my invention relates to the peculiar form and combinationof rollers and friction springs,

and to the adjustable pin by' which the notches are` directed to theirproper 'positions for receiving the ratchet which draws the bolt.

Descr-@tion of the Accompanying Drawing.

Figure I is a front view of the lock as fastened uponY rollers andfriction springs, designed for purposes now to he explained.

`irvcnerai Description;

In the accompanying drawing- Fig. 2 represents my principle .orinvention as ap plied to a spring or snap-lock, the bolt of which, A,

is pressed forward by the curved wire spring B.

@ne end of the spring B is made fast to the rivet i) upon which the boltturns, while the other end is hooked to the ratchet D and serves tomaire it press upon the wheel E,besides serving as a bolt-spring.l 4

The wheel E is either cast from one piece of metal with the shaft of theknob of the lock, or is made permanent-1y fast toit, so that, vwhen theratchet'l) enters the notch furnished upon the wheel E, it connects withthe bolt A, which is then drawn back by turning the knob. l

Upomone side of the wheel E is placed a roller of thin metal, F, iig.y5, also furnished with a notch, so that the ratchet can Vonly'enterwhen both `of the notches are brought together.

This roller turns freely upon the shaft of the wheel E, and is merelyheld in its position by a small friction spring', G, passing through'theshaft and pressing it against the wheel E, iig. 5, so that it willrevolve with- .When the notch H is formed in this roller F, iig. 5,4 thesmall piece of metal is bent so as to form a tooth standing out at rightangles from the side. A pin inserted in theback of the lock I, iig. 3,comes in 'contact with the tooth as the main wheel E is revolved, andholds the roller until the two notches are brought together, whereuponreversethe motion until the proper point is reached for the ratchet toenter.

Fig. 4 shows the back ofthe lock with a' series oi holes correspondingt0 the number of figures upon the front dial, so that, `by inserting thepin I into different places, it will -vary the point at which the rollerF will be stopped, and,.therefore, allows you toset the lock to asmanydifterent combinations. It will be observed that it is only thefirst letter, however, which is capa hie of being thus changed.

In addition to the roller F to prevent the ratchet D from enteringithewheel E, another thin piece oi' metal is added, which is alsoitted'loo'sely upon the shaft and pressed against the main wheel by afriction spring; but', being provided with two points or guards whichcome in Contact with the ratchet, it is prevented from revolving but ashort distance with the wheel, (see J in iig. 2 and fig; 5.) Its surfacerepresents a .small segment of a` circle between the guards K K, iig. 5,and a notch, into which the ratchet must of necessity pass when enteringthose of the wheelE and roller i?.-

ratchet, and therefore necessitates the junction ofthe notches at apoint ywhich is suiicientiy distant to prevent the ratchet frombetraying tothe sense of touch. v

Y Also, to prevent the ratchet from bearing upon the raising andthrowing the ratchet out oi' the notches by a continuation of a forwardmovement.

supposing the lock n ow to be set to A. X YSimply turnthe knob Mbackward, as in unwinding, until you have made one entire revolution,and the arrow points exactly at the letter A; then reverse the movement,and turn forward until you reach the letter'X;

their turn back again toward the rst letter; :and the ratchet fastensonce upon the wheel drawn backward. v

C' lat'ms.

and the boit is i I claim as my invention- 1. Slotted movable guards,rollers,4 or segments scribed by E F J, substantially as and for thepurpose*4 Y hereinbet'ore set forth.

2.- .A wheel or segment thereof revolving upon the same axis withtheother rollers by means of a. friction spring, furnished with smallslot for receiving the dog, and also provided with projections whichlimit its movements by coming 4in contact with the dog, substantially asand for the' purpose hereinbefore set forth.

v3. The combination of the bent tooth of the roller l F with thestationary pin Landthe series of holes in the back plate, as in iig.4,'for making changes with out taking the lock apart, asl and, for thepurposes hereinbeforcset forth.'

Y Y i SAMUEL LOYDV..

Witnesses:

WtB. EUTNEY, JAs. R. ADAMS.

